What if life really does begin at conception? Wouldn't the abortion issue then be more complex than just one person's decision?
I think it mainly about the conflict between abolute God given Morals and more progressive relative morals.
If you follow relative morals there simply is a difference between a fully grown person and a bunch of cells that clumb together with have human DNA.
That doesn't mean that those cells that clumb together have no rights but it does mean that you have to balance their right with the rights of a fully grown person. The right to control your own body is a very strong one, so it triump over the right of a bunch of cells.